JPH1015064A - Communicating needle for medicinal liquid packing type syringe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a communicating needle from shaking when mounted at the mouth part of a syringe and to prevent the disengagement thereof from the mouth part of the syringe at the time of removing a cap. SOLUTION: This communicating needle 1 consists of a hollow needle body 2 which is formed by having a hypodermic needle juncture 21 and a pricking needle 22 respectively on the front and rear of a hub 23 and a cylindrical skirt part 3 with which this needle body 2 is successively provided. This skirt part 3 has the bore approximately equal to the outside diameter of the cylindrical part 52 of the syringe 5 shown in Fig. and is fitted slidably onto the cylindrical part 52 of the syringe 5. The needle body 2 of the communicating needle 1 is preferably protected against contamination by a cap 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe which is filled with a drug solution in advance and which can inject the drug solution aseptically at the time of use, ie, a so-called drug-filled syringe. More specifically, the present invention relates to an improvement in a communication needle used for a drug-filled syringe disclosed in Japanese Patent Application Laid-Open No. 6-261946 by the present applicant.

[0002]

2. Description of the Related Art There is a so-called prefilled syringe (drug-filled syringe) as an aseptic syringe for aseptically injecting a drug solution during use. In general, a prefilled syringe is a so-called syringe outer cylinder in which a chemical solution is filled in a cylindrical container having both open ends, and both open ends thereof are respectively closed with rubber stoppers, and the inside of the syringe outer cylinder and an injection needle. It is composed of a combination with a communicating means. The drug-filled syringe disclosed in Japanese Patent Application Laid-Open No. 6-261946 by the present applicant includes a barrel (syringe outer cylinder), a plunger inserted into the barrel, a needle body, and a substantially cylindrical engaging member. A communication needle that pierces the rubber stopper at the mouth of the barrel, and a cap that removably accommodates the communication needle and guides the piercing operation to push down the communication needle; It is designed to be fixed to the mouth.

[0003]

However, the communication needle used in the medical-solution-filled syringe disclosed in Japanese Patent Application Laid-Open No. 6-261946 is a communication needle due to the shape of the mouth of the barrel to which the engaging member is mounted. The communication needle attached when removing the cap from the communication needle, such as when the communication needle attached to the mouth of the barrel is loose and the fitting of the cap and the communication needle is tight, especially when the connection needle attached to the barrel There is a risk that the injection operation may be hindered due to being disengaged from the part. The present invention has been made in view of the above circumstances, and has a syringe (barrel).
An object of the present invention is to provide a communication needle which does not shake when attached to the mouth of the syringe and does not come off from the mouth of the syringe when the cap is removed.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention employs a construction in which a communication needle is mounted on a barrel of a syringe. That is, the present invention provides a hollow needle body having a needle connection portion to which an injection needle can be connected and a puncture needle capable of piercing a rubber stopper of a drug-filled syringe on the front and back of the hub, respectively. A cylindrical skirt portion connected to the puncture needle side of the hub of the needle body, the skirt portion having an inner diameter substantially equal to the outer diameter of the body portion of the drug-filled syringe; It is a communication needle for a drug-filled syringe that is slidably mounted on the portion. Here, the needle body may be protected by a cap so as not to be contaminated. In addition, the inner diameter of the portion of the skirt portion adjacent to the hub of the needle body is reduced to a diameter substantially equal to the outer diameter of the mouth portion of the syringe so that the rubber stopper of the syringe can be more accurately pierced by the puncture needle of the needle body. It may be diameter. In order to prevent the puncture needle pierced through the rubber stopper from dropping off easily, the reduced diameter skirt portion is provided with a flexible engaging means which projects inside and engages with the mouth of the syringe. Is also good.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. 1 is a longitudinal sectional view showing one embodiment of the present invention, FIG. 2 is a perspective view showing a relationship between a communication needle for a drug-filled syringe shown in FIG. 1 and a cap, and FIG. 3 is another embodiment of the present invention. FIG. 4 is a longitudinal sectional view showing a state in which the communication needle shown in FIG. 1 is attached to the drug-filled syringe, and FIG. 5 is a rubber needle plug at the mouth of the drug-filled syringe in FIG. It is explanatory drawing which shows the state which pierced. As shown in FIGS. 1 and 2, the communication needle 1 for a drug solution-filled syringe of the present invention (hereinafter simply referred to as the communication needle 1) includes an injection needle connection portion 21 and a puncture needle 22.
Needle body 2 having on the front and back of hub 23 respectively
And a cylindrical skirt portion 3 connected to the needle body 2. The skirt portion 3 has an inner diameter substantially equal to the outer diameter of the body portion 52 of the drug-filled syringe (hereinafter simply referred to as a syringe) 5 shown in FIG. It is installed. Here, the communication needle 1 is the needle body 2
Is preferably protected from contamination by a cap 4.

[0006] The needle body 2 has a hub 23 at an intermediate portion.
A puncture needle that has an injection needle connection portion 21 on the front side (tip side) of the hub 23 to which an injection needle (not shown) can be connected, and that can pierce the rubber stopper 53 of the syringe 5 on the back side 23 of the hub 23. 2
Two. The injection needle connecting part 21 and the puncture needle 22 are usually hollow members formed coaxially, and the hollow part is a liquid medicine passage 2 for discharging the liquid medicine contained in the syringe 5.
It is four. The injection needle connecting portion 21 may be simply a luer tip. However, as shown in FIG. 1, a female screwing means 25 may be provided concentrically on the outer side to enable screwing or luer connection of the injection needle.

The skirt portion 3 is a cylindrical member provided on the side of the puncture needle 22 of the hub 23 of the needle body 2 and connected to the hub 23 and has an inner diameter substantially equal to the outer diameter of the body 52 of the syringe 5. It can be slidably inserted outside the body 52 of the syringe 5. The skirt portion 3 may be reduced in diameter such that the inner diameter of the portion 31 of the needle body 2 adjacent to the hub 23 is substantially equal to the outer diameter of the mouth portion 51 of the syringe 5.
By providing 1, the penetration of the rubber stopper 53 of the syringe 5 by the puncture needle 22 becomes more accurate. Reduced skirt 31
As shown in FIG. 3, a flexible engaging means 32 that engages with the mouth portion 51 of the syringe 5 may be provided so as to protrude inward.
Thereby, it is possible to prevent the puncture needle 22 pierced through the rubber stopper 53 from easily falling off. As the engaging means 32, for example, as shown in FIG. Etc. are suitably adopted. Note that a vertical rib 34 may be provided on the inner wall of the skirt 3 so that the engagement strength between the skirt 3 and the body 52 of the syringe 5 does not become too large.

Although the cap 4 is not always necessary, it is preferable to cover the needle body 2 to protect the injection needle connecting portion 21 of the needle body 2 from contamination. In this case, the cap 4 may be fitted to the skirt portion 3, but the male screw 33 is provided near the hub 23 of the needle body 2 in the skirt portion 3 so that the cap 4 does not come off during transportation or the like. It may be provided and screwed with the female screw 41 of the cap 4. Also,
The engagement groove 4 is provided near the lower end inner wall of the skirt portion of the cap 4.
2 may be provided so as to engage with an annular rib 36 provided in the vicinity of the diameter reduction start portion of the diameter reduction skirt portion 31.

Next, the use of the communicating needle of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. Before use, the communication needle 1 is attached to the body 52 of the syringe 5 as shown in FIG. At this time,
The puncture needle 22 of the communication needle 1 is connected to the rubber stopper 5 of the mouth 51 of the syringe 5.
It is in a position close to 1. When the cap 4 is pushed down by hand or the like, the skirt 3 slides along the body 52, so that the communication needle 1 is accurately guided by the rubber stopper 53 of the syringe 5, and the rubber stopper 53 is punctured by the puncture needle 22. Passed. FIG. 5 shows a state in which the cap 4 has been removed from the communication needle 1 after the rubber stopper 53 has been pierced with the puncture needle 22, and in this state, a medicinal solution (not shown) previously filled in the syringe 5 is injected. Can be.

[0010]

As is apparent from the above description, by employing the communication needle of the present invention, the communication needle mounted on the mouth of the syringe does not fluctuate. Since the communication needle does not come off the syringe when it is removed from the syringe, it does not hinder the injection operation.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a perspective view showing a relationship between a communication needle for a drug-filled syringe shown in FIG. 1 and a cap.

FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a state in which the communication needle shown in FIG. 1 is mounted on a drug solution-filled syringe.

FIG. 5 is an explanatory view showing a state in which a rubber plug at the mouth of the drug-filled syringe is pierced with a communication needle in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Communication needle 2 Needle body 21 Injection needle connection part 22 Puncture needle 3 Skirt part 32 Engagement means 4 Cap 5 Syringe

Claims (4)

[Claims] 1. A hollow needle body having a needle connection portion to which an injection needle can be connected and a puncture needle which can pierce a rubber stopper of a drug-filled syringe on the front and back of the hub, respectively, and the needle. A cylindrical skirt portion connected to the puncture needle side of the hub of the body, the skirt portion having an inner diameter substantially equal to the outer diameter of the body portion of the drug-filled syringe; A communication needle for a drug-filled syringe that is slidably mounted on the syringe. 2. The communicating needle according to claim 1, wherein the needle body is protected by a cap. 3. The communicating needle according to claim 1, wherein the inner diameter of a portion of the skirt portion adjacent to the hub of the needle body is reduced to a diameter substantially equal to the outer diameter of the mouth of the syringe. 4. The communicating needle according to claim 3, wherein a flexible engagement means is provided on the reduced diameter skirt portion so as to protrude inward and engage with the mouth portion of the syringe.